Drawing mechanisms for textile machines



Nov. 7, 1961 R. BALMES SOLANAS 3,00

DRAWING MECHANISMS FOR TEXTILE MACHINES Filed March 22, 1955 INVENTOR RAMON BA LMES SOLANAS ATTORNEYS United States Patent DRAWING MECHANISMS FOR TEXTILE MACHINES Ramon Balmes Solanas, Santa Coloma de Cervello, Spain, assignor to Estirajes Balmes, S.A., Barcelona, Spain Filed Mar. 22, 1955, Ser. No. 495,871

Claims priority, application Spain Apr. 9, 1954 2 Claims. (Cl. 19-157) This invention relates to an improvement in or modifioation of the mechanism for drawing textile rovings or slivers claimed in our prior specification Ser. No. 384,245, now Patent No. 2,798,259. These drawing mechanisms are employed both in spinning machines and in preparation machines, in which the roving or ribbon of fibres passes through a series of successive pairs of rollers, and sometimes through other elements which accompany the fibres. In these mechanisms it is already usual, in order to enable a large draft of the roving to be effected, to guide the fibres to the final or delivery rollers by means of members which accompany and retain the fibres, ob viating any detachment of the fibres from the roving, but permitting slipping thereof in order that the drawing may be possible.

In our said prior specification there is employed, for guiding the fibres to the drawing rollers, a small device which is interposed between two consecutive pairs of rollers, and which acts as a conductor and presser of the fibres, and at the same time as a collector of these fibres, or a condenser of the roving. This device consists of a rigid frame, which depends from a fibre-conducting roller, and such roller bears upon the lower rollers of two consecutive pairs of rollers of the drawing mechanism. The lower part of the frame forms a handle, to facilitate the operations of locating the device on the machine and removing it therefrom. The roving bears against the lower portion of the fibre-conducting roller, and then passes through the condenser, which collects the fibres together and gives them cohesion.

The present invention relates to improvements in the construction and mounting of the frame that supports the conductor roller of the fibres, by means of which substantial advantages are obtained in the use and operation of spinning machines.

These improvements consist essentially in eliminating the handle or upper part of the frame that supports the conductor roller, limiting this frame to the lower portion, which forms the condenser of the roving, and the two upwardly directed lateral branches, which carry, on their inner faces, the circular rims or bearings for the rotation of the roller. In this way a frame of reduced dimensions is obtained, which exhibits advantages of practical importance in comparison with the frame of our said prior specification.

The invention, incorporated in a fibre-collecting and conductor device according to our said prior specification, interposed between two consecutive pairs of rollers of a drawing mechanism, and resting upon the lower rollers of these two pairs, is illustrated in the accompanying drawings, in which:

FIGURE 1 is a perspective view of the device, looked at from the side on which the fibres isue, to be seized by the front pair of rollers;

FIGURE 2. is a similar view from the opposite side, that is to say, the side on which the fibres enter;

FIGURE 3 is a view in elevation, partly in section, looked at from the exit side of the fibres; and

FIGURE 4 is a side view of a modification, of symmetrical construction, which can be placed on a spinning machine on one side or the other indifferently.

This conducting and fibre-uniting device comprises a roller 1, which has in its lateral faces circularholes 2, in

3,007,211 Patented Nov. 7, 1961 which are engaged circular projections 3, presented by the inner faces of the frame. These circular projections on the frame, which constitute the trunnions or pivots of rotation of the roller 1, are preferably made annular, that is to say, they are provided with a central aperture 4.

The invention consists essentially in limiting the frame to the lower part 5, which forms the reducer or condenser 6 of the roving, and the two lateral walls 7, which project upwards from the sides of this lower part, and present on their inner faces the circular projections 3 which form the journals for the rotation of the roller 1.

This frame may be made of a number of pieces of moulded material, united by a screw 8, as indicated in FIGURE 1, but is preferably made in one piece of a moulded material which exhibits a certain elasticity, sufiicient to enable the two lateral branches of the frame to be easily separated by hand, thereby enabling the roller to be conveniently put in and taken out for cleaning, without it being necessary to use a screwdriver or any other tool.

In certain cases it is also possible to make the frame 5, 7 completely symmetrical, as illustrated in FIGURE 4, so that the roving can enter the lower reducer just as well on the one side as on the other, and so that in placing the fibre-conducting device on the spinning machine it will not be necessary to seek the side corresponding to the en trance of the roving, but it can be placed on one side or the other indiiferently. Although with this arrangement the uniting or condensing of the fibres does not prove so perfect as with the arrangement of FIGURES 1 to 3, it may prove convenient in many cases, thanks to its greater handiness of manipulation.

In the application of this invention, experience has shown not only that the upper prolongation or handle, which according to our said prior specification was considered necessary in order to facilitate the manipulation of the assemblage, is not indispensable, but also that by omitting it, advantages of a practical order are obtained for the operation of the spinning machine and for the work of the operatives. In the first place, with the usual arrangement of spinning machines, there is sufiicient space left on each side of the frame 5, 7 to enable this frame to be taken hold of laterally with the fingers and placed in the machine or taken out of it. This is facilitated by the cavities 4 in the two sides of the frame.

Furthermore, according to this invention other advantages are obtained:

The frame is easier to mould, and proves more economical owing to the smaller quantity of material required;

With the omission of the handle, the risk of spinning waste accumulating between the handle and the roller is eliminated;

With the omission of the handle, the possibility of a rocking movement of the frame is eliminated, and it is ensured that the reducer formed by the lower part of the frame will always be maintained in a stable and correct position, so that the outlet from the throat 6 of the reducer always remains in contact with the lower roller of the front pair.

The new arrangement of the frame facilitates for the operatives the cleaning of the roller and frame during the operation of the machine, and obviates, in the cleaning operations, the giving of shocks to the frames, which frequently result in breakages of threads.

The frame may be constructed in one piece, thus facilitating the construction, and if a material having a certain elasticity is selected, as hereinbefore indicated, the fibre-conducting roller can easily be withdrawn, whenever this is requisite for the purpose of cleaning it, and returned to its place, without having to dismount the frame.

Finally, bearing in mind that in a continuous spinning machine the number of frames employed may range from 300 to 500 approximately, the omission of the handles 'has the result that the drawing-mechanism assemblage proves more free from impediments and more accessible for cleaning.

I claim:

1. A fiber conducting roller and condenser for a drawing mechanism for textile rovings or slivers designed to be positioned between consecutive pairs of drawing rollers wherein said fiber-conducting roller bears upon the lower rollers of two consecutive pairs of rollers consisting in a fiber conducting roller, a rigid frame depending from said fiber conducting roller, a condenser for the roving forming an integral part of said frame at the lower portion thereof, two integral lateral branches upon said frame directed upwardly and located one at each side of said condenser and trunnions upon the free ends of said branches for said roller.

2. A device as claimed in claim 1 wherein said frame is moulded in a single piece fi'om a material having a slight elasticity, suflicient to allow said two branches to be separated far enough to enable said roller to be manually easily removed and inserted.

References Cited .in the file of this patent UNITED STATES PATENTS 

